How did you access it before? Sorry I'm not familiar with the software you're talking about.
Was there a tool bar in IE that you just had to hit buttons on to use HP SWP?
Or was it a separate window that you had to open from IE?
from what I can gather from my IE ( I don't use it often)
there's an option to enable/disable add-ons for IE (where you can turn certain things on/off)
there's also an option to search for more (which takes you to MS website)
After you've installed the add-on, go to IE to View menu at the top.
Check under Toolbars and also under Explorer Bar, perhaps it's being installed but not added to IE interface by default so you have to do so yourself.
I've also found this